Cooling unit for refrigerating systems



March 31, 1931. I M, oo-m 1.198.652

COOLING UNIT FOR' REFRIGBHATI NG SYSTEMS Illad'Enh. 13. 1930 2Shuts-Sheet 1 INVENTOR Zrrrz'sffliaoih BY Z ATTORNEfl March 31, 1931. MBOOTH 1,798,652

COOLING UNIT FOR REFRIGERATING SYSTEMS Filed Feb. 13, 1930 2 Shuts-Shut2 INVENTOR orriZBooZh f; M

ATTORNE Patented Mar. 31, 1931 PATENT OFFICE- UNITED STATES Thisinvention relates sohcooling units for refrige' an as to "cularly w itli ii of the 811mm and provided with a suitable header.

resent inmfiofi isaa'7continiiiilatiopulin part0 my a cation 0. 8,843 y17, 1929, will mainly directed to novel improvements in the fabricationof the complete sheetmetal unit and in the details of the novel in comleted unit.

a single outlet connected wit respecifically, it isthe object of thepresent invention to row a coolin unit refembly formed 0 a single sheet0 meta the header and side walls of which are completey fabricated andformed prior to shapmg e unit. In this case, the header and floatchamber and the side walls are preferably stamped from sheet metal, oneor more of the side walls being corrugated and. the con portions betweenthe corru tions being w ed r rior to distortion.

Another important eature of this invention "des in the manner offabricating the unit whereby the side walls which are formed integralwith the head and which lead therefrom, are positions above the point atwhich the ends of the side walls contact with the header. This not onlyresults in marked efliciencies in the operation of the unit but alsoresults in a marked saw in hi and fabrication. The sidew which lea fromthe upper part of the header are referably provided with a plurality ofinle but the ends of these side walls and garticularly the corrugationsthereof prefers 1y terminate in a manifold which in turn ma terminate inthe interior of the header. This results in much stro r headerconstruction, and particularl res ts in eifecting a positive circulationo the mfri rant.

her features reside in the details of construction as will be moreclearly brought out in the specification and claims.

In the drawings:

Fig. l is a perspective view illustrating the form of the unit after ithas been fabricated and preparatory to being sha d.

Fig. 2 is a perspective view ustrating one manner of forming the unitshown in Fig. 1.

Fig. 3 illustrates a inodified construction wherein the fabricated sidewalls are shaped to provide a plurality of shar freezin chambers P K Fg. 4 1s a pers ctive view illustrating a modified step in e method ofmanufacture wherein the complete unit is formed from two preformedhalves.

Fig. 5 illustrates the preferred manner .of positioning my novelunit'within a cabinet.

Fi 6 is a perspective view illustrating a mod ed form of the inventionwherein the unit including the header thereof is fabricated from twopreformed sheets of metal, the two wings and the entire unit beingwelded together before being bent into shape.

Fi ii. 7 18 a front elevation of a further modi ed form of the inventionwherein the return side of the passagewa formed by the sheet metalsections termina at the bottom of the header.

Fig. 8 is a somewhat diagrammatic view illustrating a unit embodyin thefeatures of the resent invention but a apted to be utilize in conectionwith a refrigerating system of the dry type.

The present unit may be fabricated from sheet metal into many difiere'nttypes and shapes of cooling units and for this reason the drawings mustbe considered as more or less diagrammatic. Re rdless of the form of thecoolin unit I pre erably fabricate the same from r atively thin iaugesheet metal. In order to ermit of quic and inex nsive assembly, t 5sheet metal is pre erably shaped to provide a flat side 1, a cor tedside 2 and a header portion or drum It will be understood that both thesides 1 and 2 may be corrugated if desired, but in the simpilest formonly one side need be corruate g The sheet metal blank ispreferablyinitially formed by stamping out the header or drum 3, thecorrugated portion of the side wall 2 and then folding over the same asshown in Fig. 1. The corrugations 4 in this side wall preferablyterminate in a manifold 5 and this manifold 5 in turn terminates, in asuitable connectin conduit 6. There may be one or more of 51888 conduits6 but one is all that is nry, as will be later explained.

When the two side walls shied gether, as shown in y pre ere y areinserted in a stitching machine or other form of welding machine and thecontacting iaces of the two side while be tween the corru ations,suitably secured together. The si e walls may then be gradually bent. soas to form the complete coohn unit and in Fig. 2 I have shown one formso bending the side walls.

In forming the unit the side wall immediately adjacent the header 8 ispreferably bent at an angle as at 7, then bent to form the side wall 8,the bottom wall 9 and the spaced side wall 10. In Fi 2 the walls 8, 9and 10 form three sides 0 the unit, and the bottom part of the headerand the inclined walls extending from the header formthe fourth side.The walls of the header 8 are preferably imperiorateexoept at a point 11where the conduit 6 is c to the interior of the header. The and 12 ofthe two wallsl and 2 may, if desired, be welded to the outer surface ofthe header 8 but due to the provision of the manifolil 5 the ends ofsaid walls are not connected with the interior of the header.

The point 11 at which the conduit 6 en here the header 3 is preferablyat a lower level than the level at which the corrugations 4 lead intothe header 8, but both the level of the outlet conduit 6 and that of theinlet conduits formed by the corrugations 4 are preferably below thenormal level of the liquid within the; header.

In Fig. 8 I have illustrated a.slightly modified form of constructionwherein the bottom wall is bent to. form three separate sharp freezingchambers. In this connecti on. it will be obvious that after the sidewalls are formed, as shown in Fig. 1, they may be shaped insubstantially any manner desired so as to form shrugs freezing chamberscompletel surround by refrigerant or only partia y surrounded refrirant.

In abricating the originals sets 0 metal before distorting the sides toform the cooling unit, I ma. form the sheets in two integral halves, asest shown in Fig. 4. In this case the one half may be generallydesignoted 13 and the other half 14, and it will obvious that such twohalves may be stamped out and fabricated to form the same relative unitas that shown in Fig. l. The onl exception would be the fact that thehas or is formed in two parts with the result that the halves 15 willhave to be welded or otherwise secured together. It will be obvious thatthe point at which the header is divided may be substantially any pointin its circumference so that this method of fabrication greatly assistsin forming the inlet 11 to the header.

The main feature of the form of construction shownin F 4 isthefactthattlieeh tire unit is to from only two halves each of which may beintegrally stamped out and W h 11;. 1H s r s t" n ops on y aces e two vi fls are secured 4 her.

In Fig. ii I have illustrated the preferred manner of mounting my novelun t within asuitable refrigerating cabinet. By 'tioning the unit in themanner shown, it will be obvious that the circulation of air past theside 8 will materially assist in the va rizatiomof the li aid in suchside wall with the result that e vaporized refrigerant will rise andenter the header 8 and will in turn be replaced b li uid re rant which,will flow outwar y conduit 6 and around the passageways of the coolingunit. Inasmuch as the outlet of aseous refrigerant born the header islilni by the sine of the exhaust passagewa or the exhaust valve, it willbe obvious t tthe outlet conduit 6 need only be approximately the samesize as the gaseous outlet in the compressor. It will thus be seen thatit is only n to form a single small opening 11 in the header 3 whichwjll reduce the possibility of leakage to a mmmium.

In Fig. 6 I have disclosedthe manner of formin a coo unit somewhat alongthe lines o the unit used in Fig. 4, in that the entire unit isinitially formed of two sheet metal stamping. The u per stem ing may begenerally designated 1; and maylionsist of the semi-spherical headerportion 17 and the two 18 and 19. Each wing is preferabl provi d with aseries of corrugations 20, hose corrugations terminating in a manifold21.

The lower half may be generally designated 22 and preferably consists ofa semi-spherical header memberflh together with the flat wings 24 and25. In assembling this unit, the two halves 16 and 22 are positionedtogether as shown in Fig. 6, and each wing inserted in a suitable stitchwelding machine. All that is necessary is to stick each win in suchmachine and feed the wing in as made longitudinally in between eachcorrugation 20. The pockets 26, formed at points adjacent the headers bythe corrugations and the manifolds 21, may also be utilized in effectinga final welding or joining of the two sheet metal halves directlyadjacent the header member. As the parts are secured t0- gether in themanner illustrated, the two wing members may be bent as shown in dottedlines so as to form the sharp freezing chamber. If desired, it will beobvious that the wing memhere may be somewhat lengthened so thatthey maybe bent in the general form shown in Fig. 3.

A further modified form of construction is illustrated in Fig. 7 whereinthe header is e stitches are formed in one ieee ae ehown, in Fig. 1 lintsheet forming the 1 way: ie no formed as to terminate in a verbit tad'tthbott the f I a In, men e om m," ln l elilliave shovinauuit ofsubstantially ienticnl 11min in Fig. 2 but inverted so as to be nmeenwhich preferably enters the header below construction, to the unitreadil eda to'arefri a eyetemof chamber PM In thiffi fiilreltion. the

the ry t conduit 6 en era the header 8 in the some man ner as shown inFig. 8, and'the intake conduit 80 for the mcom1ng m the one eat of-. theunit will the bottomof the header 8 betion when it will e suction lineot the next cycle. The enchon line tioned at the bottom of the header 8.g5 IneaehofF' 1to7,ltwillbeun(lersot theboiler or evaporator mayhe'cloeed being tgsmerally indicate; in Fi tale.

It 'be obvious thet'in ron lease or stem m ll h Pad 86 yr ch'is formed 06 and 7 whereby if one oontiglm' as wall or the example shown in-Fi ch18reseed metal blanks and welded at the boiler. The caseerefore,eoconstructe d have the test tendency. to resist a'll emupon byreesure within or Furthermore, e aaeegewa metal or hem-siphon efl'ect. I

What claim is: i g

1. A cooling unit formed of sheet metal,

- comprising a substantially cylindrical header w terminating in twobeing bent to form and chamber s er in said walla an g at eader for eonducting refrigerant, a m'enifold at the end'of to said walls for dcolintheemgeof amagewa an means connecting mnm old with th: interior of theheader.

2. A. cooling unit formed ofeheet metal, comprisinga eubetantiellycylindrical header ca terminatingoint'wo spaced walls, aa id walla beinbent forni'walle of a sharp freezing :1:

er or con nc geran 1; a manifold at the end -of eaifl ane for heating deof the passageways and the Jo gin an at 82 and preferably is posinect lecape, the front elo h a suitable header cap as receive the intake andexhaust valve etruc each case have d -metal' eader or bollerchamber ofland 8, 18 mil aced'wcll eaidjalhi- 'de bzttom walle in intheAeoolingnnitolthotmha metal header-and a shar V formed of yallefabricated to rant ways, tlie end of one \vall' i "W a ee eva rater mtie in outer one-piece shell rtion and laterally ammo: walla t to form afreezin her or cham- 1- t $3 comemen orm esgoqt e 't ieofmg grovide Illawe tmetal he l l oe ova r oom an outer one-piece hell tion 11nd late,eaid two'arcuate porbemmn 58. 1%? to f '5 or one o sa'l mu wells beinfembmd m Krovrde \yaye m1 e mm l 'er,an.a orm moneo Bar Walls andtransversely of-the pasways at a pointadjacent the-header.

A aheet metal evaporator outer-and innerahelle iabncatedtoeac form .arfion of a cylindrical header and laterall; and downwardlg dependingside walls one of snid'eide val being corrugated anti said co'rru timeopenatoneendto permit wePing tl1e in epaeee between thenhm nidweldedside7 we" at Go ,.u.' e g i tfi eideemdbotmm the! betwee n tfie a m 'onewh tfrom o nheetmetelqvepormeom "gheaderiambetmti outer end innernewsman-410cm then bending mew; mew

' w in 5 manifold po'lifi rt1 onofuey ol-lheederuidhawtheiemofnnevepontor theeidew'llla ing side 1 m e of aid it beingaeeled by weldingtoge'ther the edges oorrugl ln eudbemgopm thereof.gtoneendmdhrmmgfllelfend 18. The proeell of mk'mg e gheet tel a theevaporetorgwhieh ooneietain I. web- 7 e hndrieel heldertn permit (hugthe stantiefly eirenlu' header porlionwi late:- am in the s leenthenallyextending side walls end hterdlly em iombmbhQquduelMnde tem hngooirqget'lonsiu one well, said outmormbtg udes em! bottom gitlqnsopenlpg n! one end into the we:

comprising outer and endoitheeidewell mpemn oem; oneeoqgilntogethereothetueuateporhonsoflhe r and butler register, weklingthe side well totoioun ude gather on between tie eormgntiona PWgzthenetertapg 'a from from the helder, and a on-ag e! min 6. de: well,mto the m e en en rotor, 25 extendingtransvemely-eemeeiqfintmmefl theside walls being seale by toco honeend spaced "hor dmteneqhom .getherthe ed'gee thereof. mid der, the-two wells being aeeuged to- 14. A sheetmetnl ooo'fing unit of the .gether'in the speeesbetweenthe-oon gefiens;floodedtype eomprisin e hquid end, gee 10. A 9100888 0 mnking meveporltm for chamber, conduits fox-me" by m exteniion of :0 ereh'igerfltor fromtw'o eheeteol m which material formin'gthe chamber andextending u consists in forming eomplemen I der froma ointalongone sidethereof and 5mmdepressions in a; portion oi eaeh eet M111 wud1ytm1efinee freezing lnterllly extendmg I onefieheet, eeid corruga ionso emng' et one from a int where said eonduite lesdfrom' 55 end into saidheader rfion end te -wading the w thereof q nmu'llolrl conn cting the m.

' of ma shee eupe1' ends oi said oomimte and e omrlm t onnedim oeingsent eheets so that potin; said menifold math and o enmg in the tionn remter, welding the beets toget er on and ehlmher. lines between theeon-options,- and that 15. A sheet meta-1 enporltor .40 bending the'ahoeia thuseeeemr er apto outer end-inner shells fabricated toeee form1 the form of en evaporator, the eete er porli li'ndnenl head r,edieeent eeeled by weldingtogether the edges thereo header oo L end 11 Aprocess oi'meking m evlporltor for end m allay ereh-lgeretortromtwosheets of metal whih dnenlhelderJ yextm eo sistfl in forming comlement"? heeder an said I depression! in the eentnl portion of ysexteninto sheet and laterally extenfing ea-db eonjne117 extending gationa inone sheet, aid corrugations openther around the ing at one end who saidheader rtion and e spew n0 termineting near the opxosite "of adjacentthe header ed 1! sheet, mperim oeing sol sheets the't the e walls beingbent vet-d1;

header portlo r; welding the sheets between the corrugations end,together on lines the co nu etepomt speeediromthe hemertoforme andaround the ed end then bendmg the freezmgfchamber, and

e sheets thus secured together into the form of memiold extemlmg when a]15o l e a l1 EV I.

mm mmofmmnguheetmm aeidfiretnemed evepontor, which consists in to l eub-1B. 4. ooling umt 00mg eeymmetstan'tielly circuhr header portion wilater.- rloal pleoe of motel-folded upon meal! on subally extending sidewalls end lateral y exetentlellz center transverse line, the two atending eorruglfions in one well, said eon'uo the sheet beingiepeeed atthe line getione o emng' at one end into the hood?, of old to form nheader and the remunder e aide the o e 4 end of the side wall. su erimoaiqg kg their edges, into w ys formed in wells together sothat areueteportmns of the at least one mg m extending from and m header to near thegpgosite side of said unit, said wing portion 0 t e unit fo at least twosides of a sharp freezing cham r and means for closing the open ends ofsaid header.

17. A coolin unit of the flooded comprisin a float amber the sides of w'ch are orme of contiguous sheet metal walls, one of which is corrugatedsaid walls meeting and contacting except for said corru 'ons andextending laterally from one si e only of the chamber and thendownwardly to form refrigerant assageways and at least two walls of a reigeratinf chamber.

18. A cooling unit 0 the flooded t ,comprising a header chambersubstantia {cylindrical in shape, the drum of said 0 amber formed from asingle piece o! sheet metal, said piece of sheet metal meeting andcontinuing as adjacent walls to form the sharp freezing chamber of theunit, said adjacent walls being permanently secured together and formedto provide passageways for the refri erant, and said wallsextendmgdownward y and outwardly from the float chamber so as to provideinclined assageways for the refrigerant, and then ownwardly to form anouter wall of the sharp freezing chamber.

In testimony whereof I aflix m si ature.

MORRIS F. O

header to near the opposite side of said unit, said wing portion of theunit forming at least two sides of a sharp freezing chamber and meansfor closing the open ends of said header.

17. A cooling unit of the flooded type, comrising a float chamber thesides of which are i ormed of contiguous sheet metal walls, one of whichis corrugated said walls meeting and contacting except for said corruations and extending laterally from one si e only of the chamber andthen downwardly to form refrigerant assageways and at least two walls ofa re rigeratin chamber.

18. A cooling unit 0 the flooded type, com prising a header chambersubstantially cylindrical in shape, the drum of said chamber formed froma single piece of sheet metal, said piece of sheet metal meeting andcontinuing as adjacent walls to form the sharp freezing chamber of theunit, said adjacent walls being permanently secured together and formedto provide passagewa s for the refrigerant, and said walls extendlngdownwardly and outwardly from the float chamber so as to provideinclined passageways for the refrigerant, and then downwardly to form anouter wall of the sharp freezing chamber.

In testimony whereof I aifix my si nature.

MORRIS F. BO TH.

DISCLAIMER 1,798,652.M0rr1ls F. Booth, Chicago, Ill.

SYsTELrs. Patent dated March 31, 1931. the asslgnee, Mu l'insManufacturing Oorpor Coonme UNIT non REFRIGERATING Dlsolaimer filedAugust 8, 1931, by

Hereby enters this disclaimer to claim N o. 5 in the said patent, thesaid claim being here quoted as follows, to wit:

A sheet metal evaporator comprising portion and laterally extending sidewa chambers, an inner one-piece shell having an opposite] laterallyextending walls cooperatin with the side we an outer one-piece shellhaving an arcuate s bent to form a sharp freezing chamber or formedarcuate portion, and s of the outer shell, said two arcuate portionsregistering comp ementally to form a substantially cylindrical header,one of sald laterally extending walls being embossed to providepassageways leading from said header.

[Oficwl Gazette September I, 1931 .1,

DISCLAIMER 1,798,652.M0r1-s F Booth, Chicago, Ill. COOLING UNIT FORREFRIGERATING SYSTEMS. Patent dated March 31, 1931. Disclaimer filedAugust 8, 1931, by the assignee, Mu lins Manufacturing Corporation.

Hereby enters this disclaimer to claim N o. 5 in the said patent, thesaid claim being here quoted as follows, to wit:

A sheet metal evaporator comprisin an outer one-piece shell having anarcuate portion and laterally extending side wal s bent to form a sharpfreezing chamber or chambers, an inner one-piece shell having anoppositely formed arcuate portion, and laterally extending wallscooperating with the side walls of the outer shell, said two arcuateportions registering complementally to form a substantially cylindricalheader, one of said laterally extending walls being embossed to providepassageways leading from said header.

[W Gazette September 1, 1981 .1

